On why bottom posting....

[Warren Young]

On 5/9/2014 13:44, Linda Walsh wrote:
> only to find that they did inject a sentence or two in the middle just to
> see if I was paying attention while scrolling...

Thunderbird puts colored bars to mark quotation levels.  If someone 
drops a single sentence in the middle of a pile-o-quotage, there is a 
break in the bar.  It's obvious.

Other mail readers colorize the quoted text instead, making the change 
in quote level even more obvious.

With an add-on, Thunderbird will do that as well:

	https://addons.mozilla.org/en-us/thunderbird/addon/quote-colors/